空间的辐射电磁场（EMI）主要是由电力网络、电气设备的暂态过程、雷电、无线电广播、电视、雷达、高频感应加热设备等产生的，通常称为辐射干扰，其分布较为复杂。若PLC系统置于所射频场内，就回收到辐射干扰，其影响主要通过两条路径：一是直接对PLC内部的辐射，由电路感应产生干扰；而是对PLC通信内网络的辐射，由通信线路的感应引入干扰。辐射干扰与现场设备布置及设备所产生的电磁场大小，特别是频率有关，一般通过设置屏蔽电缆和PLC局部屏蔽及高压泄放元件进行保护。
INGERSOLL RAND 1000 67 0-160PSI 2 IN 1/4 IN NPT PRESSURE GAUGE D538056
INGERSOLL RAND 1000 67 0-160PSI 2 IN 1/4 IN NPT PRESSURE GAUGE D538054
MCDANIEL CONTROLS J10 GAUGE 0-10IN-WC 2-1/2 IN 1/4 IN NPT D579685
AMETEK USG 0-30PSI 1/8 IN NPT PRESSURE GAUGE D575325
ASHCROFT 25W1005 H 01B 100 0-100PSI 1/8 IN NPT PRESSURE GAUGE D537493
USG 8042-47-5 0-30PSI 2-1/2 IN 1/4 IN NPT PRESSURE GAUGE D575323
ASHCROFT DURAGAUGE PRESSURE GAUGE 0-200PSI 4-1/2 IN 1/2 IN NPT D575324
TRERICE PRESSURE GAUGE 0-160PSI 1/4 IN NPT D575434
SENSOR DEVELOPMENT P10V30-30 MINIATURE PANEL LOADING STATION D575339
MCDANIEL CONTROLS AB80812 0-300PSI 1/2 IN NPT PRESSURE GAUGE D552614
DFC DYNAMIC CF1P-140A-SAE*2?000PSI PRESSURE GAUGE 2-1/2IN 7/16-20 SAE D586148
ASHCROFT 20W1005 H 01B 0-15PSI 2 IN 1/8 IN NPT PRESSURE GAUGE D552656
AMETEK USG 0-30PSI 1/8 IN NPT PRESSURE GAUGE D570104
WIKA 316SS 0-160PSI 1/4 IN NPT PRESSURE GAUGE D575798
R-22 R-12 R-502 30-0IN-HG 0-120PSI 1/8IN NPT BLUE PRESSURE GAUGE D575845
MURPHY 05051312 JOY PRESSURE GAUGE 0-30IN-H2O 1/8 IN NPT D538959
ASHCROFT 50EI60R090 BIMETAL THERMOMETER 50-400F 5IN 1/2IN NPT D586550
WIKA 213.40 9456120 0-100PSI 2-1/2 IN 1/4 IN NPT PRESSURE GAUGE D568055
WEISS -20-120F 1/2IN NPT TEMPERATURE GAUGE 6IN STEM D540910
PACIFIC SCIENTIFIC G145CBD01B 30-0IN-HG 1/2 IN NPT PRESSURE GAUGE D530587
MARSHALL TOWN 175-09-015 FIG 103 THERMOMETER 9 IN STEM 25-125F D530561
-30-0 IN-HG FLUID FILLED 1/4 IN NPT PRESSURE GAUGE D534142
AMETEK P550 PRESSURE GAUGE 0-600PSI 1/4 IN NPT D557329
REOTEMP MODEL H THERMOMETER -40-0-160F 2-3/8 IN D530855
REOTEMP MODEL H THERMOMETER 0-250F 2-3/8 IN D530856
ASHCROFT DURAGAUGE RETARD 0-60PSI 1/4 IN NPT PRESSURE GAUGE D556815
ASHCROFT 35-1009-AW-02L-?400 DURALIFE 0-400PSI 1/4 IN NPT GAUGE D557713
USG -30-0IN-HG VAC 0-200PSI 1/4 IN NPT PRESSURE GAUGE D570528
MARSH J4642 BELLOFRAM PRESSURE GAUGE 0-30PSI 2-1/2IN 1/4IN NPT D595262
MARSH J4640 BELLOFRAM PRESSURE GAUGE 0-15PSI 2-1/2IN 1/4IN NPT D595263
MARSH J4640 BELLOFRAM PRESSURE GAUGE 0-15PSI 2-1/2IN 1/4IN NPT D595259
ASHCROFT 50 EI 60 R 090 BI-METAL THERMOMETER 0-250F 1/2IN NPT D595243
WIKA 0-15PSI PRESSURE GAUGE 1/4IN NPT D561178
WATTS A8 1-1/2IN PRESSURE GAUGE 0-40BAR D595372
ASHCROFT 63W3005-HL-02L-?100 PRESSURE GAUGE 0-100PSI 63MM 1/4IN NPT D571400
USG PRESSURE GAUGE 0-10PSI 4-1/2IN 1/4IN NPT D583256
ASHCROFT 35W-1005-H-02L-?100 0-100PSI 1/4IN NPT PRESSURE GAUGE D567594
ASHCROFT 35-1009-AW-02L 0-400PSI 3-1/2IN 1/4IN NPT PRESSURE GAUGE D567587
ASHCROFT 63-1008-S-02L 0-800PSI 63MM 1/4 IN NPT PRESSURE GAUGE D567573
ASHCROFT 30EI60R040 10454176-6 BIMETAL THERMOMETER 0-200F 3 IN D553146
ASHCROFT 30EI60R040 10251772-2 BIMETAL THERMOMETER 50-300F 3 IN D553142
ASHCROFT 50 EI 60 R 090 BIMETAL THERMOMETER 0-250F 5 IN D553053
ASHCROFT 30-EI-60-R-060-?0/250F THERMOMETER 0-250F 3 IN 1/2 IN NPT D571522
ASHCROFT 30EI60R060 BIMETAL THERMOMETER 50-300F 3 IN D553097
ASHCROFT 30EI60R040 BIMETAL THERMOMETER 100-800F 3 IN D553127
NOSHOK 15-100-30-PSI/K?PA 0-30PSI 1/8 IN NPT PRESSURE GAUGE D553147
USG 0-400PSI 2-1/2 IN 1/4 IN NPT PRESSURE GAUGE D553173
WEKSLER UA25F4L 0-300PSI 2-1/2 IN 1/4 IN NPT PRESSURE GAUGE D553126
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